Perforating mechanism



L. JANSSENS.

'PERFORATING MECHANISM.

APPLICATION FILED MAY 22. 1914.

1 Patented Apr. 18, 1922.

stares LOUIS JANSSENS, 0F BRUSSELS, BELGIUM.

PERFORATING MECHANISM.

Continuation in part of application Serial No. 780,281, filed April 10, 1913.

' Serial No. 840,255.

Specification of Letters Patent. Patented Apr. .18, 1922- This application filed May (GRANTED UNDER THE PROVISIONS 01- THE ACT or Mason 3, 1921, 41 smn 1., 1313.

To all w 710m it may concern .Be it known that I, Louis JANSSENS, a subject of the King of Belgium, resident at Brussels, 49 B-ue du Pont Neuf, Belgium, have invented new and useful Improvements in Perforating Mechanism (for which I have filed applications in Belgium, May 28, November 11th, and December 3rd, 1912; Germany, April 2d, 1913; Italy, April 7th, 1913; France, April 5th, 1913; Great Britain, April 1st, 1913; Holland, April 12th, 1913; Rumania, February 22, 1913; Spain, February 28, 1913; Switzerland, March 6, 1913; Denmark, March 3, 1913; Russia, March 21, 1913; Hungary, March 20, 1913; Austria, March 26, 1913; India, March 31, 1913; Canada, April 8, 1913'; Australia, April 1st, 1913; Brazil, April 18, 1913; Argentina, April 25, 1913,) of which the following is a specification.

It is the object of the present invention to provide an apparatus for perforating a band on which notes of music are recorded in synchronism with the movement of akinematographicfilmlso that appropriate pieces of music can be recordedv and thereafter reproduced in synchronism with the pictures on the film as they are projected on a screen.

In order to achieve this result the musician who must be well acquainted with the single scenes on the film will during a trial projection of the pictures on the film upon a screen, play on a musical instrument an improvisoof a suitable music piece, the single notes or tunes of which are recorded in the well known manner upon an endless note band.

It is the object of the present invention to perforate this band in synchronism with the movement of the film hand during the reproduction of the picture in order to make the same adapted to be moved synchronously with said film. 1

With this end in View the drum from which the film is unrolling is closing an electric circuit at the end of each revolutionenergizing an electro-magnet which controls a perforating device producing upon each revolution of the film spool a perforation in the note band thus providing a means for moving the band durin the reproduction in synchronism with the film band and reproducing between each two perforations a at itsupper end an insulating plate 6 and a contact screw 7 andat its opposite end a contact screw f.

upper end to the contact screw 7 and to the plates 6 and d, while its lower'end is nora pre A flat contact spring 9 issecuredwith its mally kept at a distance from the contact screw f. One pole of a battery it is connected by a wire z' with the upper contact or pole screw f,while its other pole is connected by a wire z" to an electro-magnet t which is also connected by means of a wire 2' tothe lower contact screw f. The electro-magnet t forms part of a perforator comprising a standard is to the upper bent arm of which the rear end of an arm m is pivotally secured at Z, while the front end of said arm carries a contact plate 0 forming the armature of the electro-magnet t.

- Intermediate its ends the arm m carries a perforating too-l n and a spring it connect ing the outer end of said arm to an arm 79 of the standard is tending to normally hold the armature 0 out of contact with the electromagnet 25 so'that the perforating tool is also kept out of contact with the note band 7" upon the table 9 which underneath of said perforator is provided with an opening or hole 8. The note band 1" is moved across the table step-b-y-step by means of any well known device not illustrated in the drawing.

The apparatus works in the following manner:

lVhile during the normal position of rest of the parts the circuit over the battery It is interrupted on account of the space separating the spring 9 from the contact f", the contact spring 9 during the rotation of the film spool will be pressed towards the plate (Z as soon as the projection c of the film spool during the rotation of the same comes into contact with said spring. Therefore, while said projection is pressing against the cenmovement. However, as soon as the pin or projection c has passed the curved central part of the spring 9 said spring will return into its initial position and the circuit will again be opened at the contact screw f" and will remain open until the film spool a, has carried out one full revolution and then the pin 0 will again pressthe spring 9 toward the plate 0 and close the circuit at the contact screw 7 which operation will thescenes on the film which'follow one anneouslystarted and their speed is automa'tibe successively repeatedupon each'full revolution of the drum or spoola. I p

In order to play such a perforated record in absolute coincidence, as regards time, with other, this latter is placed in the kinematog'raph and the music strip'in the reproducing instrument in their respective starting positions and then both instruments, the k'i'nematograph and the piano are simultacally regulated by the synchronizing apparatus described in myco-pending application No. 760,281, filed April 10, 1913, of whichthis application is a continuation in part. The reproducing apparatus described in this former application which is used in connection with the music strip in which signs or perforations are marked by means of the recording device forming the object of the present invention, for maintaining synchronlsm during the reproduction, con

sists of two movable members providedwith needles or pointers, one of which is displaced to a certain extent on the passage of a perforation on the music strip, while the other is displaced to a similar extent after a similar movement of the film has been executed. One of these members being provided with an electric resistance, while the other is provided with an electric contact whichis displaced on the resistance in either one direction or the other according to circumstance that one or the other member will lead'or lag. Thereby the supply of the current to the motors is regulated in such a manner as to speed the one which lags and to tamp the'action of the. one which is leading.

I declare that what I claim is:

1. A perforating device of the character described comprising in combination, a? toothed drum over which passes a perforated kinematographic film, a shaft forsaid drum and means for automatically and synchronously perforating a music strip in harmony with the unwinding of the kinematographic film upon each revolution of the drum, substantially as described.

2. A perforating device of the character described, comprising in combination," a toothed drum over which passes a perforated kinematographic film, a shaft for saiddrum, means on said shaft for closing an electric circuit at the end revolution of said drum, and perforating members operated uponthe closing of said contact for automatically and synchronously perforating the music strip in harmony with the unwinding of the kinematograph film, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

LOUIS JANSSENS.

Witnesses:

ERNEST FAHRIN, I CHAs. RoY NASMITH. 

